Artificial tooth



N0. 607,2". Patented July I2, I898. G. BUCHANAN.

ARTIFICIAL TOOTH.

(Application filed Dec. 17, 1897.)

(No Model.)

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GEORGE BUCHANAN, OF PHILADELPHIA, PENNSYLVANIA.

ARTIFICIAL TOOTH.

SPECIFICATION forming part of Letters Patent No. 607,211, dated July 12,1898. Application filed December 17, I897. Serial No.662,250. (Nomodel.)

To all whom it may concern.-

Be it known that I, GEORGE BUCHANAN, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Artificial Teeth, whichimprovement is fully set forth in the following specification andaccompanying drawings. 7

My invention relates to novel means for firmly connecting an artificialtooth to the plate therefor, the same embodying an anchor which isinterlocked in the tooth and adapted to have a pin soldered or otherwiseattached thereto, said anchor consisting of a main plate,rearwardly-extending legs at the ends of said plate, andlaterally-extending feetat the ends of said legs, the tooth havingcavities therein to accommodate said plate, legs, and feet, whereby theanchor cannot be withdrawn from the opening or cavity in the tooth whichit occupies, thus reliably retaining the anchor in position andpreventing disconnection of the pin from the tooth, it beingparticularly noticed that said laterally-extending feet occupy cavitiesrearward of the cavity of the main plate and forward of the rear wall ofthe tooth, so shoulders are formed rearward of said feet, against whichsaid feet solidly abut, and all the members of the anchor are entirelyinclosed within the tooth. Furthermore, the anchor is formed of a pieceof metal which may be easily bent to the shape required, as well as cutinto a variety of lengths, according to the size of the tooth to containan anchor.

Figure 1 represents a side elevation of a tooth embodying my invention.Fig. 2 represents a longitudinal section thereof. Fig. 3 represents ahorizontal section thereof on lineccm,Fig.1.Figxlrepresentsaverticalseotion of the tooth in position without theanchor and pin. Fig. 5 represents a perspective view of the anchor andpin embodying my invention.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings, A designates an artificial tooth, withinwhich is a cavity A, occupied by an anchor B, which is embedded in thetooth in the process of the formation of the same, the opening or cavityin the tooth receiving said anchor, the latter consisting of a maintransverse portion, rearwardly-extending legs at the ends of said mainportion, and laterally-extending feet at the ends of said side portions.

0 designates an opening in the tooth, extending rearward from theanchorB, the same being adapted to receive the shank of the pin D, aportion of which passes through the back of the tooth and is connectedwith the plate for said tooth, said shank being provided with the head Egenerally existing in such cases.

The anchor B consists of a main plate formed of a piece of platinum orother suitable metal or material, deflected to have legs G on its sidesand laterally-extending feet H on the bases of said legs, the cavity inthe tooth being similarly shaped.

The shank of the pin D is inserted in the opening 0 and soldered to thecrown of the anchor and passes between the side limbs of the latter,thus firmly connecting said pin with the anchor, and consequently withthe tooth, it being evident that owing to the feet H the anchor isinterlocked with the tooth and prevented from being withdrawn from itsposition. Consequently the pins remain reliably secured to the tooth,this being more particularly due to the feet II, which being projectedas cross-bars into the lateral portions of the cavity A serve to controlthe anchor against outward displacement. Especially is this the case assaid feet rest solidly against the shoulders J, which extend inwardlytoward each other to the pin-opening and are located rearward of thecavities which receive said feet and forwardof the rear wall of thetooth, the rear ends of the anchor thus being entirely covered by saidshoulders and forming abutments for the feet near the rear of the tooth,where the greatest outward strain on the anchor exists. Furthermore,during the process of firing or baking the tooth the edges of the metalare not exposed, as they are embedded in the material of the tooth andso are not directly affected by the heat. Again, the anchor is formed ofa flat piece or strip of metal, which may be cut into the requiredlength and then bent into shape, and said lengths may be variedaccording to the size of the tooth which is to receive the anchor.Furthermore,the anchor terminates at the shoulders J, and the opening inthe tooth rearward of said shoulders does not require to be lined withthe expensive metal of which the anchor is formed, as the pin E fillssaid opening, and it may be made of inferior metal, thus savingconsiderable expense in the manufacture of a tooth with an anchor of thenature stated therein.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is"

1. An artificial tooth havinga main cavity extending; transverselytherein, auxiliary rearwardly-extending cavities at the ends of saidmain cavity, laterally-ex tending cavities at the ends of said sidecavities, shoulders extending inwardly toward each other and interposedbetween said laterally-extending cavities and the rear wall of the toothand an opening extending rearwardly from said main cavity and aside ofthe rearwardly and latorally extending cavities to the back of thetooth, in combination with an anchor con sisting of a strip of metalformed of a main transverse portion,rearwardly-enten din g legs at theends of said main portion and laterallyextending' feet at the rear endsof said legs, the members of the anchor occupying the respectivecavities in the tooth.

2. An artificial tooth havinga main cavity extending transverselytherein, auxiliary rearwardly-extending cavities at the sides of saidmain cavity, laterally-extending cavities at the end of said sidecavities, shoulders extending inwardly toward each other between saidlaterally-extending cavities and the rear wall of the tooth and anopening extending rearwardly from said main cavity aside of saidrearwardly and laterally extending cavities through the back of thetooth, in combination with an anchor, formed of a transverse plate,rearwardly-extending legs at the ends of said plate andlaterally-extending feet at the rear ends of said legs, and a pinconnected with the crown of said anchor and passing between said sidelegs and through the back of the tooth.

GEORGE BUCHANAN.

\Vitnesses:

JOHN A. WIEDERsHEIM, \VM. 0. IEIDERSHEIM.

